220 35569 <731b1b41-353c-4df7-bd25-2a2c1e6d628f@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: Myriachan Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: std::unreachable: the message parameter Date: Mon, 27 Nov 2017 12:36:34 -0800 (PST) Lines: 82 Approved: news@gmane.org Message-ID: <731b1b41-353c-4df7-bd25-2a2c1e6d628f@isocpp.org> References: <590f2abd-b676-4241-ae0d-1c7c95b8fe7d@isocpp.org> <5a8666ef-278e-4636-baaa-8f71c5a54a2d@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_25926_1965862028.1511814994894" X-Trace: blaine.gmane.org 1511814994 15665 195.159.176.226 (27 Nov 2017 20:36:34 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 27 Nov 2017 20:36:34 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDKLT4PURQHRBU7O6HIAKGQEVEWER5Y@isocpp.org Mon Nov 27 21:36:30 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-vk0-f71.google.com ([209.85.213.71]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eJQ8j-0003hM-Jf for gclcip-std-proposals@m.gmane.org; Mon, 27 Nov 2017 21:36:29 +0100 Original-Received: by mail-vk0-f71.google.com with SMTP id k143sf16926710vke.23 for ; Mon, 27 Nov 2017 12:36:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-subscribe:list-unsubscribe; bh=M/5aNibVHJATnmlzZDn4futmfERONfk3QaXos5Avt0w=; b=ITWqdO8VvT/thizd5N1FuZYhy8W5kYg7z0QIHQnUj2s60WeXTw7zRTJ+QNRkKUlZZa Hq6qsJtn3aZ7i6V3pP4kRfmGgdiefFqvigz1VsNEv+y4o8ApYtdTz37x1ZF4d0v6Wa/5 SC9JdjhkUTmG/ipcwqoS+HnRByu4Zi/y/GiFGUdUKMD5rFz1i6VU2CN+OLKdfmYIXDcp 702kM24+/98yhzePy0aAhSn24HACxu5cBhT6hbOU3yWLSwtarPx720+t6HTpE7MCGkbE IOw/XJT1zkDW5MQIrsqDYej71eHcHibIqlnl4AA/OBLGZT/KdzMg9HpUzJMGsYlu8IYL /1JA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-subscribe:list-unsubscribe; bh=M/5aNibVHJATnmlzZDn4futmfERONfk3QaXos5Avt0w=; b=EiWzyN9QxAXo4oHIavoy5Lh7xxSPlZYcq0zqi7OhhlyTXUpOeHmb9aRDgVAKV3dQlR u7Vj42kd6Ysp1NuiV2rrMQBmxdfAcM89lqZJFXtmHlXRsjQ0JDV+eLADomycWDzSoCuY 4q8Ko+jhE3Huei22HAiScpaJTdrx8nFSLMUL1SFcjNmm6WK3MQ6iBqqD6MYKCsXjaV6J o3PfDiNLFmBaelXkMSnX3cpmcCWBCFs8RoCxQbN+zrT+JuXVPvJacHeyvKsAPcGItV6C htC2zMnV6CWhzJNNKfeUdYiq3/CvSXwdP64J7aVCUtfGzSOc8YNS9VKuT+TWu2QK42Bg +xDg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:message-id:in-reply-to:references :subject:mime-version:x-original-sender:reply-to:precedence :mailing-list:list-id:x-spam-checked-in-group:list-post:list-help :list-archive:list-subscribe:list-unsubscribe; bh=M/5aNibVHJATnmlzZDn4futmfERONfk3QaXos5Avt0w=; b=VP+W+/2YmbtKM09qelK6bRpMTyfTjLz/lmxXsVNrCcGnA4Wg+O1oP3QPr0oca1qXVf LXEmkcLElSVkPrtvIo8KDxwojdvLJ/qGpIuKTDBMlo5aEqqwYTu0kOJuQD+9AavsdrMw kmQzEw+Ns1Dq5PeEYjybd4NgDf+Gupo44AsNPZYJu7MlAM+J9X+qYkVC6sYI7vyHfe8B V1doKP8hFoYdgF+tWpxjhV9Swk0rOpfJ3VyQRoUE6xFAoZ5bIDCGMvTFzkZWmnz5+kjC X5+BWppK+cJAAPNFEGg4cbeLWnFsNxWaSKLMLxIjAJOQCeOhTRcAj3PZ144qygwJVRll MwIw== X-Gm-Message-State: AJaThX7vJY0Bj2YrEN8pZ5HyWQvTWAIgc1VVmXwEq3vfs7i0RqJY4IRF lf1R1fnmDJzR50M6wrTbXa1rGA== X-Google-Smtp-Source: AGs4zMav5rhy0i92LaasSYJdrGWGSLQhN5+fVeukagrhgbWoposQ9AzvRLU/n5P/fHxmh3D/xsj2TQ== X-Received: by 10.176.69.193 with SMTP id u59mr19512179uau.85.1511814996726; Mon, 27 Nov 2017 12:36:36 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.159.45.129 with SMTP id v1ls2224636uaj.18.gmail; Mon, 27 Nov 2017 12:36:35 -0800 (PST) X-Received: by 10.31.162.19 with SMTP id l19mr1519447vke.4.1511814995335; Mon, 27 Nov 2017 12:36:35 -0800 (PST) In-Reply-To: <5a8666ef-278e-4636-baaa-8f71c5a54a2d@isocpp.org> X-Original-Sender: myriachan@gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:35569 Archived-At: ------=_Part_25926_1965862028.1511814994894 Content-Type: multipart/alternative; boundary="----=_Part_25927_1531922935.1511814994894" ------=_Part_25927_1531922935.1511814994894 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wednesday, November 22, 2017 at 8:10:06 PM UTC-8, Arthur O'Dwyer wrote: > > > Assuming (correctly IMO) that the 'message' parameter is a `const char*`,= =20 > it points to a null-terminated sequence of characters, which by definitio= n=20 > are in the execution character set. The translation of a string literal (= if=20 > any) from the source character set into a sequence of bytes in the=20 > execution character set has, by runtime, already happened; and therefore= =20 > std::unreachable() doesn't need to do anything special to deal with it. > > =E2=80=93Arthur > Should I add a form that takes a std::string_view in addition to the const= =20 char * form? Or only have a string_view form, since std::string_view has a= =20 NUL-terminated const char * constructor? Melissa --=20 You received this message because you are subscribed to the Google Groups "= ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. To view this discussion on the web visit https://groups.google.com/a/isocpp= ..org/d/msgid/std-proposals/731b1b41-353c-4df7-bd25-2a2c1e6d628f%40isocpp.or= g. ------=_Part_25927_1531922935.1511814994894 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
On Wednesday, November 22, 2017 at 8:10:06 PM UTC-8, Arthu= r O'Dwyer wrote:

Assuming (correctly IMO) that the 'message' param= eter is a `const char*`, it points to a null-terminated sequence of charact= ers, which by definition are in the execution character set. The translatio= n of a string literal (if any) from the source character set into a sequenc= e of bytes in the execution character set has, by runtime, already happened= ; and therefore std::unreachable() doesn't need to do anything special = to deal with it.

=E2=80=93Arthur

Should I add a form that takes a std::string_vie= w in addition to the const char * form?=C2=A0 Or only have a string_view fo= rm, since std::string_view has a NUL-terminated const char * constructor?

Melissa

--
You received this message because you are subscribed to the Google Groups &= quot;ISO C++ Standard - Future Proposals" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+unsubscribe@isocpp.org.
To post to this group, send email to std-proposals@isocpp.org.
To view this discussion on the web visit https://groups.google.= com/a/isocpp.org/d/msgid/std-proposals/731b1b41-353c-4df7-bd25-2a2c1e6d628f= %40isocpp.org.
------=_Part_25927_1531922935.1511814994894-- ------=_Part_25926_1965862028.1511814994894-- .